Caramelized onion and apple slab tart

This delicious tart can either be served as an appetizer or with a hearty salad as an entree for four.

The Garden of Eating
This tart combines rich nutty cheese, mellow onions, and sweet apples.

Onions and apples and cheese, oh my! The combination of gooey, rich and nutty cheese, mellow onions, and sweet apples is not to be missed.

I made this one by rolling out a batch of pie crust into one flat sheet, layering on the onions, apples, cheese, and thyme, and then baking until golden and crisp. The easier option would be to use puff pastry and the results would undoubtedly be buttery, crispy, and delicious. In terms of cheese, I used Cabot sharp white cheddar, which I find to be quite tasty, and some Parmesan. I'm also a big fan of Kerrygold's Dubliner Irish cheddar for its sweet, nutty flavor, and Gruyère would also be nice.

The prep consists of making the dough (or skip this whole step and just use puff pastry – Dufour's is the best you can get, in my opinion); then the slicing of apples and onions and shredding of cheese. I'd recommend using a hand-held mandolin for the apples to speed things up and to get really thin slices. Followed by a long, slow sauté of onions to get everything really soft and sweet.

Then you are ready to eat!

Caramelized Onion & Apple Slab Tart  

A single pate brisee dough or 2 sheets of puff pastry
2 apples, cored and thinly sliced or mandolined – you can leave the skin on or peel them, it's up to you
2 large onions, peeled and thinly sliced
Leaves from 3 sprigs of fresh thyme
1 cup grated cheddar cheese
1 cup grated Parmesan, Romano or Gruyère cheeses
Sea salt and freshly grated black pepper to taste
2 tablespoons butter or olive oil – or a mix of the two
A splash of stock, balsamic vinegar or water to deglaze the pan

1. Preheat the oven to 400 degrees F.

2. Caramelize the onions. Melt the butter (or heat the oil) in a large heavy frying pan then add the onions and cook over medium-low heat for a loooong time, stirring every 5-10 minutes to keep them from burning. Once they're finished cooking, deglaze the pan with a little wine, stock, or balsamic vinegar and salt to taste. Please note that to truly caramelize onions, it can take up to an hour, depending on how big the onions are. If you don't have time for this, just sauté them for a few minutes – they'll still be delicious.

3. Roll out the dough or lay out the puff pastry on a heavy baking sheet. Top with the caramelized onions, the thinly sliced apples and the cheese then sprinkle with salt and pepper and bake for 20-25 minutes (checking it at 15 just to be sure you're not burning them) or until the crust is golden brown and the cheese is bubbly with nice crisp areas.

You've read  of  free articles. Subscribe to continue.
Real news can be honest, hopeful, credible, constructive.
What is the Monitor difference? Tackling the tough headlines – with humanity. Listening to sources – with respect. Seeing the story that others are missing by reporting what so often gets overlooked: the values that connect us. That’s Monitor reporting – news that changes how you see the world.

Dear Reader,

About a year ago, I happened upon this statement about the Monitor in the Harvard Business Review – under the charming heading of “do things that don’t interest you”:

“Many things that end up” being meaningful, writes social scientist Joseph Grenny, “have come from conference workshops, articles, or online videos that began as a chore and ended with an insight. My work in Kenya, for example, was heavily influenced by a Christian Science Monitor article I had forced myself to read 10 years earlier. Sometimes, we call things ‘boring’ simply because they lie outside the box we are currently in.”

If you were to come up with a punchline to a joke about the Monitor, that would probably be it. We’re seen as being global, fair, insightful, and perhaps a bit too earnest. We’re the bran muffin of journalism.

But you know what? We change lives. And I’m going to argue that we change lives precisely because we force open that too-small box that most human beings think they live in.

The Monitor is a peculiar little publication that’s hard for the world to figure out. We’re run by a church, but we’re not only for church members and we’re not about converting people. We’re known as being fair even as the world becomes as polarized as at any time since the newspaper’s founding in 1908.

We have a mission beyond circulation, we want to bridge divides. We’re about kicking down the door of thought everywhere and saying, “You are bigger and more capable than you realize. And we can prove it.”

If you’re looking for bran muffin journalism, you can subscribe to the Monitor for $15. You’ll get the Monitor Weekly magazine, the Monitor Daily email, and unlimited access to

QR Code to Caramelized onion and apple slab tart
Read this article in
QR Code to Subscription page
Start your subscription today